TWI742739B - Bundling machine - Google Patents

Abstract

A rebar bundling machine capable of forming a state where the end of a metal wire faces the side of a bundle of reinforcing bars or the like, and bundling the bundle with the wire. The steel bar binding machine (1A) includes: a magazine (2A) that can accommodate 2 metal wires (W) in a protruding manner; a crimping guide (5A) that winds the side-by-side metal wires (W) on the steel bar (S) ) Around; the wire feeding part (3A), in the action of sending out the wires (W) side by side, the wire (W) is wound around the steel bar (S) with the crimping guide part (5A), and the The wire (W) wound around the steel bar (S) is wound tightly on the steel bar (S); and the binding part (7A) is one end of the wire (W) wound around the steel bar (S) The intersecting parts of the side and the other end side are twisted together. The binding part (7A) is provided with a bending part (71), and the one end part side and the other end part side of the wire (W) wound around the reinforcement (S) are bent toward the reinforcement (S).

Description

Bundling machine

The present invention relates to a binding machine that binds bundles of steel bars and the like with metal wires.

In the prior art, there is a binding machine called a steel bar binding machine, which winds two or more steel bars with metal wires, and then twists the wound metal wires to bind the two or more steel bars.

The conventional steel bar binding machine cuts the fed steel wire around the steel bar, twists the intersecting part of the one end side and the other end side of the metal wire, and binds the steel bar (for example, refer to Patent Document 1).

The one end side and the other end side of the metal wires of the steel bars bundled by the conventional steel bar binding machine are formed to face the opposite side of the steel bars with respect to the steel bars at the wire binding site. However, in the state where one end and the other end of the bundled metal wire are facing the opposite side of the steel bar, the tip of the wire will be formed in a state where the tip side of the metal wire is more protruding than the twisted part of the metal wire. , So it may hinder the operation.

In response to this, Patent Document 2 discloses a technique of bending the wire to the side of the steel bar without letting the tip side of the wire protrude.

In addition, Patent Document 3 discloses a technique of bending the end portion of the wire toward the twisting direction. Advanced technical literature

Patent Document 1: Japanese Patent No. 4747455 Patent Document 2: Japanese Patent No. 4570972 Patent Document 3: Japanese Patent No. 5674762

However, neither Patent Document 2 nor Patent Document 3 discloses a specific method of how to bend the wire in which direction. Therefore, even if the wire is bent so that the end of the wire is located closer to the bundle than the top of the wire, the direction of bending the wire may not be fixed in the desired direction, and it may not be possible to fold reliably. Bend the wire so that the end of the wire faces the side of the steel bar.

In order to solve the above-mentioned problems, the present invention provides a binding machine that can reliably bend the wire in a desired direction so that the end of the wire is positioned closer to the side of the bundle than the top of the wire.

In order to solve the above-mentioned problems, the present invention proposes a binding machine, a feeding member capable of winding the wire around the bundle; a holding member, holding the wire wrapped around the bundle by the feeding member; bending member, bending The wire is such that the end of the wire held by the holding member is closer to the bundle side than the top of the wire.

In the binding machine of the present invention, by bending the bending member of the wire, the end of the wire held by the holding member is positioned closer to the bundle side than the top of the wire, so that it can be folded reliably The bent wire has an end facing the wire in a desired direction that is closer to the bundle side than the top of the wire.

Hereinafter, with reference to the drawings, an example of a reinforcing bar binding machine as an embodiment of the binding machine of the present invention will be described. >Structure example of the reinforcing bar binding machine of the present embodiment>

Fig. 1 is a structural diagram viewed from the side showing an example of the overall structure of the reinforcing bar binding machine of the present embodiment. Fig. 2 is a structural diagram viewed from the front showing an example of the overall structure of the reinforcing bar binding machine of the present embodiment. Here, Fig. 2 schematically illustrates the internal structure of the line A-A in Fig. 1.

As shown in Fig. 1, the reinforcing bar binding machine 1A of this embodiment is a portable binding machine that can be transported. Compared with the use of a wire with a larger diameter in the prior art, the rebar binding machine 1A uses two or more wires W with a smaller diameter to bundle the rebar S as a bundle. In the steel bar binding machine 1A, as described later, the wire W wound around the steel bar S is brought into close contact with the steel bar S by the action of winding the wire W around the steel bar S, and the winding is tightened to The wire W of the steel bar S is twisted, and the steel wire W is bundled with the steel bar S. In the steel bar binding machine 1A, the wire W is bent regardless of any of the above actions. Therefore, by using the metal wire W with a diameter smaller than that of the conventional steel bar, the wire can be wound around the steel bar S with less force. And twist the wire W with less force. In addition, by using two or more metal wires, the binding strength of the metal wire W to the steel bar S can be ensured. In addition, with the structure in which two or more wires W are fed in parallel, the time required for the operation of winding the wire W can be shorter than the time of the operation of winding one wire on the rebar 2 times or more. . in addition. The operation of winding the wire W around the steel bar S and the winding operation of making the wire W wound around the steel bar S close to the steel bar S are collectively referred to as winding the wire W. The object to which the wire W is wound may be a bundle other than the steel bar S. Here, the metal wire W may be a single-wire metal wire composed of a metal that can be plastically deformed, or a stranded metal wire.

The rebar binding machine 1A is equipped with: a magazine 2A, which is a receiving part for receiving the wire W; a wire feeding part 3A, which sends out the wire W contained in the magazine 2A; and a side-by-side guide 4A to feed the wire W The wire W of the feeding part 3A is aligned with the wire W fed from the wire feeding part 3A. In addition, the steel bar binding machine 1A is provided with a crimping guide 5A that winds the wire W fed side by side around the steel bar S; and a cutting portion 6A that cuts the metal wire W wound around the steel bar S. The reinforcing bar binding machine 1A further includes a binding section 7A, which grips and twists the wire W wound around the reinforcing bar S.

The magazine 2A is an example of a storage member. In this example, the reel 20 is detachably stored, and two long metal wires W are wound around the reel 20 in a freely extending manner. The reel 20 includes a cylindrical pivot portion 20a in which the wire W is wound, and a pair of flange portions 20b provided on both ends of the pivot portion 20a in the axial direction. The flange part 20b has a diameter larger than the diameter of the pivot part 20a, and protrudes in a radial direction from the axial direction both ends of the pivot part 20a. Two or more wires W are wound around the pivot portion 20a. In this example, two wires W are wound. In the rebar binding machine 1A, the reel 20 contained in the magazine 2A rotates while using the action of sending out the two wires W by the wire feeder 3A and the action of manually sending out the two wires W. One side of the wire W protrudes from the reel 20. At this time, the two wires W are wound around the pivot portion 20a, so that the two wires W can extend without twisting each other.

The wire feeding part 3A is an example of a wire feeding member constituting a feeding member. As a pair of feeding members that send out the wires W side by side, they include: a spur gear that sends out the wires W in a rotating motion. The first feed gear 30L and the second feed gear 30R, which are also spur gear-shaped, which sandwich the wire W together with the first feed gear 30L. The detailed description of the first feed gear 30L and the second feed gear 30R will be described later, but both are spur gears in which teeth are formed on the outer peripheral surface of a disc-shaped member. However, as long as the first feed gear 30L and the second feed gear 30R can mesh with each other to transmit the driving force from one feed gear to the other, and the two wires W are appropriately sent out, there is no limitation. If it is a spur gear.

Each of the first feed gear 30L and the second feed gear 30R is constituted by a disc-shaped member. In the wire feeding portion 3A, the first feeding gear 30L and the second feeding gear 30R are provided with the feeding path of the wire W interposed, whereby the outer peripheral surfaces of the first feeding gear 30L and the second feeding gear 30R correspond to each other. Towards. The first feed gear 30L and the second feed gear 30R sandwich two parallel wires W between the opposing portions of the outer peripheral surfaces. The first feed gear 30L and the second feed gear 30R are pushed along the extending direction of the wire W in a state where the two wires W are side by side.

Fig. 3 is a structural diagram showing an example of the feed gear of this embodiment. Here, Fig. 3 is a cross-sectional view taken along the line B-B in Fig. 2. The first feed gear 30L includes a tooth portion 31L on the outer peripheral surface. The second feed gear 30R includes a tooth portion 31R on the outer peripheral surface.

The first feed gear 30L and the second feed gear 30R are arranged side by side so that their teeth 31L and 31R face each other. In other words, the first feed gear 30L and the second feed gear 30R are arranged side by side in the axial direction Ru1 of the loop Ru formed by the wire W wound by the crimping guide 5A, that is, along the loop formed by the wire W When Ru is regarded as a circle, the imaginary circle is arranged side by side in the axial direction. In the following description, the axial direction Ru1 of the loop Ru formed by the wire W wound by the crimping guide 5A is also referred to as the axial direction Ru1 of the loop-shaped wire W.

The first feed gear 30L includes a first feed groove 32L on the outer peripheral surface. The second feed gear 30R includes a second feed groove 32R on the outer peripheral surface. The first feed gear 30L and the second feed gear 30R are arranged such that the first feed groove portion 32L and the second feed groove portion 32R face each other.

The first feed groove portion 32L is formed in a V groove shape along the rotation direction of the first feed gear 30L on the outer peripheral surface of the first feed gear 30L. The first feed groove portion 32L has a first inclined surface 32La and a second inclined surface 32Lb that form a V groove shape. The cross-sectional shape of the first feed groove portion 32L is formed in a V groove shape such that the first inclined surface 32La and the second inclined surface 32Lb face each other at a predetermined angle. When the wire W is sandwiched between the first feed gear 30L and the second feed gear 30R, the first feed groove 32L will be aligned with one of the wires on the outer side of the wire W. In contact, in this example, a part of the outer peripheral surface of one wire W1 of the two wires W in a row is in contact with the first inclined surface 32La and the second inclined surface 32Lb.

The second feed groove portion 32R is formed in a V groove shape along the rotation direction of the second feed gear 30R on the outer peripheral surface of the second feed gear 30R. The second feed groove portion 32R has a first inclined surface 32Ra and a second inclined surface 32Rb that form a V groove shape. The cross-sectional shape of the second feed groove portion 32R is formed in the same V groove shape as the first feed groove portion 32L such that the first inclined surface 32Ra and the second inclined surface 32Rb face each other at a predetermined angle. When the wire W is sandwiched between the first feed gear 30L and the second feed gear 30R, the second feed groove 32R will be aligned with the other of the wires on the outer side of the wire W. In this example, a part of the outer peripheral surface of the other wire W2 of the two wires W side-by-side is in contact with the first inclined surface 32Ra and the second inclined surface 32Rb.

The depth and the angle (between the first inclined surface 32La and the second inclined surface 32Lb) of the first feed groove portion 32L are designed so that when the first feed gear 30L and the second feed gear 30R clamp the wire W The part of the one wire W1 in contact with the first inclined surface 32La and the second inclined surface 32Lb that faces the second feed gear 30R protrudes more than the tooth bottom circle 31La of the first feed gear 30L.

The depth and the angle (between the first inclined surface 32Ra and the second inclined surface 32Rb) of the second feed groove portion 32R are designed so that when the first feed gear 30L and the second feed gear 30R clamp the wire W The portion of the other wire W2 that is in contact with the first inclined surface 32Ra and the second inclined surface 32Rb that faces the first feed gear 30L protrudes more than the bottom circle 31Ra of the second feed gear 30R.

Thereby, one of the two wires W sandwiched between the first feed gear 30L and the second feed gear 30R is pressed against the first inclined surface 32La of the first feed groove portion 32L. On the second inclined surface 32Lb, the other wire W2 is pressed on the first inclined surface 32Ra and the second inclined surface 32Rb of the second feed groove 32R. Then, one metal wire W1 and the other metal wire W2 are pressed against each other. Therefore, by the rotation of the first feed gear 30L and the second feed gear 30R, the two wires W (one wire W1 and the other wire W2) are fed in the first and second feed gears 30L and 30R. When the gears 30R are in contact with each other, they are sent out at the same time. In addition, in this example, the cross-sectional shape of the first feed groove portion 32L and the second feed groove portion 32R is a V groove shape, but it is not necessarily limited to a V groove shape. For example, it may be a trapezoid shape or an arc shape. In addition, in order to transmit the rotation of the first feed gear 30L to the second feed gear 30R, a transmission mechanism may be provided between the first feed gear 30L and the second feed gear 30R. The second feed gear 30R is composed of even-numbered gears that rotate in opposite directions to each other.

The wire feed unit 3A includes a drive unit 33 that drives the first feed gear 30L, and a displacement unit 34 that presses and disconnects the second feed gear 30R with respect to the first feed gear 30L.

The drive unit 33 includes a feed motor 33a that drives the first feed gear 30L, and a transmission mechanism 33b that is composed of a combination of gears and the like that transmit the driving force of the feed motor 33a to the first feed gear 30L.

The first feed gear 30L rotates because the rotation movement of the feed motor 33a is transmitted through the transmission mechanism 33b. The second feed gear 30R rotates along with the first feed gear 30L because the rotation of the first feed gear 30L is transmitted to 31R through the tooth portion 31L.

Therefore, by the rotation of the first feed gear 30L and the second feed gear 30R, the friction force generated between the first feed gear 30L and one wire W1, the second feed gear 30R and the other wire W1 are utilized. The friction force generated between the metal wires W2 and the friction force generated between one metal wire W1 and the other metal wire W2, the two metal wires are sent side by side.

The wire feed unit 3A switches the rotation direction of the first feed gear 30L and the second feed gear 30R by switching the forward and reverse rotation directions of the feed motor 33a, and switches the feed direction of the wire W.

In the rebar binding machine 1A, the first feed gear 30L and the second feed gear 30R are rotated forward by the wire feed portion 3A, whereby the wire W moves in the positive direction shown by the arrow X1, that is, to the crimp guide It is sent out in the direction of the lead 5A, and is wound around the steel bar S by the crimping guide 5A. Also, after the wire W is wound on the steel bar S, the first feed gear 30L and the second feed gear 30R are reversely rotated, so that the wire W goes in the opposite direction shown by the arrow X2, that is, to the magazine 2A Send out (pull back) in the direction of the By winding the metal wire W around the steel bar S and then pulling it back, the metal wire W is wound tightly on the steel bar S.

The displacement portion 34 includes: a first displacement member 35 that rotates the shaft 34a as a fulcrum to displace the second feed gear 30R in a direction in which the first feed gear 30L is disconnected and disconnected; and a second displacement member 36 , The first displacement member 35 is displaced. The second feed gear 30R is pressed in the direction of the first feed gear 30L by a spring (not shown) that biases the second displacement member 36. Thereby, the two wires W in this example are sandwiched between the first feed groove portion 32L of the first feed gear 30L and the second feed groove portion 32R of the second feed gear 30R. In addition, the tooth portion 31L of the first feed gear 30L meshes with the tooth portion 31R of the second feed gear 30R. Here, the mechanism relationship between the first displacement member 35 and the second displacement member 36 is that by displacing the second displacement member 36 to make the first displacement member 35 a free state, the second feed gear 30R can be fed from the first Although the gear 30L is separated, it may be a mechanism in which the first displacement member 35 and the second displacement member 36 are interlocked.

4A, 4B, and 4C are structural diagrams showing an example of side-by-side guidance in this embodiment. Here, FIG. 4A, FIG. 4B, and FIG. 4C are cross-sectional views taken along the line C-C in FIG. 2, showing the cross-sectional shape of the side-by-side guide 4A provided at the introduction position P1. In addition, the DD line cross-sectional view of Figure 2 showing the cross-sectional shape of the side guide 4A provided at the intermediate position P2, and the EE line cross section of Figure 2 showing the cross-sectional shape of the side guide 4A provided at the cutting and discharging position P3 The graph will also show the same shape. In addition, Fig. 4D is a structural diagram showing an example of metal wires arranged side by side. Fig. 4E is a structural diagram showing an example of a cross-twisted metal wire.

The side-by-side guide 4A is an example of a restricting member constituting a feeding member, and restricts the direction of a plurality of (two or more) wires W to be sent. The side-by-side guide 4A sends out two or more wires W that have entered side by side. The side-by-side guide 4A arranges two or more wires in a direction perpendicular to the feeding direction of the wire W. Specifically, two or more metal wires W are arranged side by side in the axial direction of the loop-shaped metal wire W wound around the reinforcing bar S by the crimp guide 5A. The side-by-side guide 4A has a wire restricting portion (for example, an opening 4AW described later) that restricts the direction of the two or more wires W and aligns them. In this example, the side-by-side guide 4A includes a guide body 4AG, and the guide body 4AG is formed with a wire restricting portion through which a plurality of wires W pass (through), that is, an opening 4AW. The opening 4AW penetrates the guide body 4AG along the feeding direction of the wire W. The shape of the opening 4AW will be determined so that when and after the plurality of wires W sent through the opening 4AW, the plurality of wires W will be side by side (the plurality of wires W are side by side in the feeding of the wire W The direction (axis direction) is perpendicular to the direction (radial direction), and the axes of the plurality of wires W are in a state of being substantially parallel to each other). Therefore, the plural wires W passing through the side-by-side guide 4A are sent out from the side-by-side guide 4A in a side-by-side state. In this way, the side-by-side guide 4A restricts the direction in which the two metal wires W are arranged in the radial direction, so that the two metal wires W are arranged side by side. Therefore, the opening 4AW has a shape in which a direction perpendicular to the feeding direction of the wire W is perpendicular to the feeding direction of the wire W and is also longer than the other direction perpendicular to the one direction. The opening 4AW (two or more wires W can be arranged side by side) will be arranged so that the longitudinal direction is along the direction perpendicular to the feeding direction of the wire W, more specifically, along the winding guide 5A. The axis direction of the looped wire W. Thereby, two or more metal wires W passing through the opening 4AW are arranged in a direction perpendicular to the feeding direction of the metal wire W, that is, in the axial direction of the metal wire W wound into a loop, and sent out side by side.

In the following description, when describing the shape of the opening 4AW, the cross-sectional shape in the direction perpendicular to the feeding direction of the wire W will be described. In addition, when describing the cross-sectional shape along the feeding direction of the wire W, it will be described from time to time.

For example, when the opening 4AW (the cross section) is a circle with a diameter more than twice the diameter of the wire W, or when the length of one side is more than twice the diameter of the wire W, it passes through the opening. The two wires W of the portion 4AW are in a state capable of moving freely in the radial direction.

When the two wires W passing through the opening 4AW are in a state where they can move freely in the radial direction in the opening 4AW, it may not be possible to restrict the direction in which the two wires W are arranged in the radial direction. The metal wires W may not be side by side, but twisted and interlaced together.

Therefore, the length of the opening 4AW in the above-mentioned one direction, that is, the length L1 in the longitudinal direction, is set to be greater than the plurality (n) of the metal wires W in a state where the plurality of (n) metal wires W are aligned in the radial direction. The sum of the diameter r is slightly longer in length. The length of the opening 4AW in the other direction, that is, the length L2 in the short-side direction is set to a length slightly longer than the diameter r of one wire W. In this example, the length L1 in the longitudinal direction of the opening 4AW has a length slightly longer than the sum of the diameter r of the two wires W, and the length L2 in the shorter direction has a length slightly longer than the diameter r of one wire W . In this example, the long side direction of the opening 4AW of the side-by-side guide 4A is formed in a straight line shape, and the short side direction is formed in an arc shape, but it is not limited to this.

In the example shown in FIG. 4A, the preferred length of the length L2 in the short-side direction of the side-by-side guide 4A is slightly longer than the diameter r of one wire W. However, the wires W are not interlaced or twisted together, and only need to come out of the opening 4AW in a side-by-side state. Therefore, the longitudinal direction of the side-by-side guide 4A is along the loop of the crimped guide portion 5A that is wound around the steel bar S The length L2 of the side-by-side guide 4A in the short-side direction is slightly longer than the diameter r of one metal wire W and is slightly longer than the diameter r of two metal wires W, as shown in Figure 4B. The sum of the diameter r of the wire W may be within a slightly shorter range.

In addition, the longitudinal direction of the side-by-side guide 4A is arranged along the direction perpendicular to the axial direction Ru1 of the loop-shaped wire W wound around the rebar S by the crimped guide portion 5A, and the short side of the side-by-side guide 4A The length L2 in the side direction, as shown in FIG. 4C, may be within a range slightly longer than the diameter r of one wire W and slightly shorter than the sum of the diameter r of the two wires W.

The longitudinal direction of the opening 4AW of the side-by-side guide 4A is arranged along the direction perpendicular to the feeding direction of the wire W. In this example, it is arranged so as to be wound around the steel bar S along the crimped guide portion 5A. The axial direction Ru1 of the shaped wire W.

Thereby, the side-by-side guide 4A can arrange and pass the two wires in the axial direction Ru1 of the loop-shaped wire W.

In addition, the length L2 in the short-side direction of the opening 4AW of the side-by-side guide 4A is shorter than the length of twice the diameter r of the wire W, and is slightly longer than the diameter of the wire W, even if the opening 4AW is in the long-side direction The length L1 is much longer than the sum of the diameters r of the plurality of metal wires W, and the metal wires W can also be passed side by side.

However, the longer the length L2 in the short-side direction (for example, a length close to twice the diameter r of the wire W) and the longer the length L1 in the long-side direction, the more freely the wire W can be in the opening 4AW move. In this way, in the opening 4AW, the axes of the two metal wires W are not parallel. After passing through the opening 4AW, the possibility that the metal wires W are twisted and intertwined is increased.

Therefore, in order to arrange the two wires W in the radial direction, the length L1 in the long side direction of the opening direction 4AW is preferably a length slightly longer than twice the diameter r of the wire W, and the length L2 in the short side direction It is preferably a length slightly longer than the diameter r of the wire W.

The side-by-side guide 4A is provided on the upstream and downstream sides of the first feed gear 30L and the second feed gear 30R (wire feed portion 3A) relative to the feed direction in which the wire W is fed in the forward direction. Location. By providing the side-by-side guide 4A on the upstream side of the first feeding gear 30L and the second feeding gear 30R, the two wires W enter the wire feeding portion 3A in a side-by-side state. Therefore, the wire feeding part 3A can feed the wire W forward appropriately (in parallel). In addition, by providing the side-by-side guide 4A on the downstream side of the first feed gear 30L and the second feed gear 30R, it is possible to maintain the side-by-side state of the two wires W fed from the wire feeding portion 3A. While sending out the wire W further downstream.

The side-by-side guide 4A provided on the upstream side of the first feed gear 30L and the second feed gear 30R is installed so that the wires W sent to the wire feeding portion 3A are aligned in the predetermined direction described above. The introduction position P1 between the first feed gear 30L, the second feed gear 30R, and the magazine 2A.

In addition, one of the side-by-side guides 4A provided on the downstream side of the first feed gear 30L and the second feed gear 30R is arranged so that the wire W sent to the cutting portion 6A will be aligned in the predetermined direction. Therefore, it is provided at an intermediate position P2 between the first feed gear 30L, the second feed gear 30R, and the cutting portion 6A.

In addition, the other of the side-by-side guide 4A provided on the downstream side of the first feed gear 30L and the second feed gear 30R is arranged so that the wire W sent to the crimping guide portion 5A is aligned in the predetermined direction. Therefore, it is set at the cutting and discharging position P3 where the cutting portion 6A is arranged.

In the side-by-side guide 4A provided at the introduction position P1, the opening 4AW has the above-mentioned shape that restricts the direction in which the wire W is directed in the direction at least downstream of the feeding direction of the wire W in the forward direction. . In contrast, the opening 4AW has a larger opening area on the upstream side in the feed direction of the wire W in the forward direction, that is, the side facing the magazine 2A (wire introduction part) than the downstream side. . Specifically, the opening 4AW is a cylindrical hole that restricts the direction in which the wire W is directed, and the opening area from the upstream end of the cylindrical hole to the wire introduction portion (the entrance portion of the opening 4AW) It is made up of holes with a gradually larger cone shape (funnel-shaped, cone-shaped). In this way, the opening area of the wire introduction part is maximized, and the opening area is gradually reduced from there, so that the wire W can easily enter the side-by-side guide 4. Therefore, the work of introducing the wire W into the opening 4AW becomes easy.

The other side-by-side guide 4A also has the same structure, and the opening 4AW has the above-mentioned shape that restricts the direction in which the wire W is directed in the radial direction on the downstream side of the feed direction for feeding the wire W in the forward direction. In addition, even with other side-by-side guides 4, the opening area can be made larger than the opening area of the downstream side opening in the feed direction in which the wire W is fed in the forward direction.

The side-by-side guide 4A provided at the introduction position P1, the side-by-side guide 4A provided at the intermediate position P2, and the side-by-side guide 4A provided at the cutting and discharging position P3 are the openings 4AW perpendicular to the feeding direction of the wire W The longitudinal direction is arranged along the axial direction Ru1 of the loop-shaped wire W wound around the steel bar S.

Thereby, the two wires W delivered by the first feed gear 30L and the second feed gear 30R, as shown in Fig. 4D, will be held in parallel by the loop-shaped wires W wound around the steel bar S The state of Ru1 in the axial direction is delivered, and it is suppressed that the two wires W are twisted together during delivery, as shown in Fig. 4E.

In addition, in this example, the opening 4AW will be a cylindrical hole, and there is a predetermined length from the entrance of the opening 4AW to the exit (the feeding direction of the wire W) (the predetermined distance or depth from the entrance of the opening 4AW to the exit) ), but the shape of the opening 4AW is not limited to this. For example, the opening 4AW may be a flat hole with almost no depth such as the opening 4AW opened in the plate-shaped guide body 4AG. In addition, the opening 4AW may not be a hole penetrating the guide body 4AG, but a groove-shaped guide (for example, a U-shaped guide groove with an upper opening). Moreover, in this example, the opening area of the wire introduction part (the entrance part of the opening 4AW) is made larger than other parts, but it does not need to be larger than other parts. As described above, if the plurality of wires sent from the side-by-side guide 4A through the opening 4AW are in a side-by-side state, the shape of the opening 4AW is not limited to a specific shape.

Above, the example in which the side-by-side guide 4A is provided at the upstream (introduction position P1) and downstream predetermined positions (the intermediate position P2 and the cut-off position P3) of the first feed gear 30L and the second feed gear 30R has been described. , But the position of the side-by-side guide 4A is not necessarily limited to these 3 positions. In other words, it can be set only at the lead-in position P1, only at the intermediate position P2, only at the cut-out position P3, only at the lead-in position P1 and intermediate position P2, and only at the lead-in position P1 and P2. The cutting and discharging position P3 may be provided only at the intermediate position P2 and the cutting and discharging position P3. In addition, the side-by-side guide 4A may be provided at any four or more positions between the curl guide 5A on the downstream side from the introduction position P1 to the cutting position P3. In addition, the introduction position P1 refers to the inside including the magazine 2A. In other words, the side-by-side guide 4A may be provided in the inside of the magazine 2A, near the outlet where the wire W is sent out.

The crimping guide 5A is an example of a guide member that constitutes a feeding member, and constitutes a conveyance path in which two metal wires are wound into a circle and wound around the reinforcing bar S. The crimping guide portion 5A includes: a first guide portion 50 for crimping the wire W sent from the first feed gear 30L and the second feed gear 30R; a second guide portion 51 from the first guide portion The wire W sent out at 50 is guided to the binding portion 7A. The front end of the first guide portion 50 and the front end of the second guide portion 51 are separated, and a predetermined gap (opening) is formed in the feeding direction of the wire W. Therefore, when the wire S is bundled, or when the bundling operation is completed, the reinforcing bar S can be put in or taken out from this gap. The conventional rebar binding machine also has a ring-shaped (closed ring) crimping guide portion (for example, the strapping machine described in Patent Document 2) with no gap, but this crimping guide portion is used to make the rebar S A crimp guide opening and closing mechanism for in and out is necessary. However, if the curl guide 5A has a gap like this example, there is no need to provide a curl guide opening and closing mechanism.

The first guide portion 50 includes a guide groove 52 that constitutes a feed path of the wire W, and guide pins 53 and 53b are a type of guide member that cooperates with the guide groove 52 to curl the wire W. Fig. 5 is a structural diagram showing an example of the guide groove of this embodiment. Here, Fig. 5 is a cross-sectional view taken along the line G-G in Fig. 2.

The guide groove 52 is used to guide the wire W, and together with the side-by-side guide 4A, it limits the direction in which the radial direction of the wire W perpendicular to the feeding direction of the wire W faces. Therefore, in this example, it will constitute The shape of the opening is that one direction perpendicular to the feeding direction of the wire W is longer than the other direction that is also perpendicular to the feeding direction of the wire W and perpendicular to one direction.

The length L1 in the longitudinal direction of the guide groove 52 is slightly longer than the sum of the diameters r of the plurality of wires W in a state where the wires W are aligned in the radial direction, and the length L2 in the shorter side direction is longer than one wire. The diameter r of the wire W is slightly longer. In this example, the length L1 of the guide groove 52 in the longitudinal direction has a length slightly longer than the sum of the diameters r of the two metal wires. Then, the guide groove 52 is arranged so that the direction in which the longitudinal direction of the opening faces is the axial direction Ru1 of the loop-shaped wire W. In addition, it is not necessary for the guide groove 52 to have a function of restricting the direction in which the radial direction of the wire W faces. In this case, the dimensions (length) of the guide groove 52 in the long-side direction and the short-side direction are not limited to the above-mentioned dimensions.

The guide pin 53 is provided on the side of the introduction portion of the wire W sent from the first feed gear 30L and the second feed gear 30R in the first guide portion 50, and is arranged at a position relative to the guide groove 52 formed The feed path of the wire W is located inside the loop Ru formed by the wire W in the radial direction. The guide pin 53 restricts the feeding path of the wire W so that the wire W fed along the guide groove 52 does not sink into the inner side of the ring Ru formed by the wire W in the radial direction.

The guide pin 53b is provided on the discharge part side of the wire W sent from the first feed gear 30L and the second feed gear 30R in the first guide part 50, and is arranged at a position relative to the guide groove 52 formed The feed path of the wire W is located outside the loop Ru formed by the wire W in the radial direction.

The wire W sent by the first feed gear 30L and the second feed gear 30R will be formed by the wire W at two points outside in the radial direction of the ring Ru and one point inside between these two points. At least 3 points in total, restrict the radial position of the loop Ru formed by the wire W, thereby crimping the wire W.

In this example, for the feeding direction of the wire W sent in the positive direction, the side-by-side guide 4A provided at the cutting and discharging position P3 on the upstream side of the guide pin 53 and the downstream guide 4A provided on the guide pin 53 The two points of the guide pin 53b on the side restrict the position of the outer side in the radial direction of the loop Ru formed by the wire W. In addition, the guide pin 53 restricts the position of the inner side of the ring Ru formed by the wire W in the radial direction.

The crimping guide portion 5A has a retracting mechanism 53a that retracts the guide pin 53 from the path along which the wire W moves during the operation of winding the wire W on the steel bar S. After the wire W is wound around the steel bar S, the retracting mechanism 53a is displaced in conjunction with the movement of the binding portion 7A, and moves the guide pin 53 from the wire W before the time when the wire W is wound around the steel bar S Retreat on the path.

The second guide portion 51 is provided with a fixed guide portion 54 as a third guide portion that limits the radial position of the ring Ru formed by the wire W wound around the rebar S (the diameter of the wire W toward the ring Ru Direction movement); and the movable guide portion 55, as the fourth guide portion, restricts the position in the axial direction Ru1 of the ring Ru formed by the wire W wound on the rebar S (the wire W faces the axis of the ring Ru Movement in the direction Ru1).

The fixed guide portion 54 is provided with a wall surface 54 a located on the outer side in the radial direction of the loop Ru formed by the wire W wound around the steel bar S, and is formed by a surface extending in the feeding direction of the wire W. When the wire W is wound around the rebar S, the fixing guide 54 restricts the radial position of the ring Ru formed by the wire W wound around the rebar S by the wall surface 54a. The fixed guide 54 is fixed to the main body 10A of the reinforcing bar binding machine 1A, and is fixed in position with respect to the first guide 50. In addition, the fixed guide 54 may be integrally formed with the main body 10A. Moreover, in the structure in which the fixed guide 54 as another part is attached to the main body 10A, the fixed guide 54 may be incompletely fixed to the main body 10A, so that the movement of forming the ring Ru can be restricted. The wire W may be movable to the extent that it moves.

The movable guide portion 55 is provided on the front end side of the second guide portion 51, and wall surfaces 55a are provided on both sides of the ring Ru formed by the wire W wound around the steel bar S in the axial direction Ru1, and the wall surfaces 55a face the diameter of the ring Ru It stands on the inner side of the direction and rises from the wall surface 54a. When the wire W is wound around the steel bar S, the movable guide portion 55 restricts the position of the ring Ru formed by the wire W wound around the steel bar S in the axial direction Ru1 by the wall surface 55a. The movable guide portion 55 has a wide space between the wall surfaces 55a on the tip side where the wire W fed from the first guide portion 50 enters, and has a shape that narrows toward the fixed guide portion 54 and the wall surface 55a is tapered. Thereby, the wire W sent out from the first guide portion 50 is restricted by the wall surface 55a of the movable guide portion 55 at its position in the axial direction Ru1 of the coil Ru of the steel bar S, and is guided to the fixed position by the movable guide portion 55导导部54.

The movable guide part 55 is supported by the fixed guide part 54 by the shaft 55b on the side opposite to the tip side into which the wire W sent out from the first guide part 50 enters. With the shaft 55b rotating along the axis direction Ru1 of the ring Ru formed by the wire W wound around the steel bar S as a fulcrum, the wire W sent from the first guide portion 50 in the movable guide portion 55 enters The distal end side opens and closes in the disconnecting direction with respect to the first guide part 50.

When the rebar tying machine bundles the rebar S, the rebar S is put (set in) between a pair of guide members installed for winding the wire W around the rebar S. In this example, it is the first guide. Between the portion 50 and the second guide portion 51, the bundling operation is then started. When the bundling work is completed, in order to perform the next bundling work, the first guide part 50 and the second guide part 51 are pulled out from the rebar S after the bundling is completed. When pulling out the first guide part 50 and the second guide part 51 from the reinforcing bar S, move the reinforcing bar binding machine 1A in the direction away from the reinforcing bar S, that is, in the direction of arrow Z3 (refer to the first figure), The steel bar S can be detached from the first guide portion 50 and the second guide portion 51 without any problem. However, for example, when the steel bars S are arranged at predetermined intervals along the arrow Y2, and these steel bars S are to be bundled in sequence, it is quite inconvenient to move the steel bar binding machine 1A in the direction of the arrow Z3 each time it is bundled. If you can move in the direction of arrow Z2, you can work quickly. However, for example, in the conventional reinforcing bar binding machine disclosed in Patent No. 4747456, the guide member corresponding to the second guide member 51 of this example is fixed to the main body of the binding machine. Therefore, if the reinforcing bar binding machine is to be When moving in the direction of arrow Z2, the guide member will be caught by the steel bar S. Therefore, in the steel bar binding machine 1A, the second guide member 51 (movable guide portion 55) is made movable as described above, and when the steel bar binding machine 1A is moved in the arrow Z2 direction, the steel bar S will move from the first The guide part 50 and the second guide part 51 are separated from each other.

Therefore, the movable guide part 55 opens and closes between the guide position and the retracted position by the rotation operation with the shaft 55b as a fulcrum. The guide position is a position where the movable guide part 55 can guide the wire W sent from the first guide part 50 to the second guide part 51. The retracted position is a position where the movable guide 55 is retracted by the action of moving the reinforcing bar binding machine 1A in the direction of arrow Z2 and allowing the reinforcing bar binding machine 1A to be separated from the reinforcing bar S.

The movable guide portion 55 is pressurized by a pressure mechanism such as a spring, not shown, in the direction in which the distance between the tip side of the first guide portion 50 and the tip side of the second guide portion 51 approaches. The force of the spring remains in the guiding position. In addition, in the operation of pulling out the reinforcing bar binding machine 1A from the reinforcing steel bar S, the movable guide portion 55 is pushed by the reinforcing bar S, whereby the movable guide portion 55 is opened from the guide position to the retracted position.

The cutting portion 6A includes: a fixed blade portion 60; a rotating blade portion 61 that works with the fixed blade portion 60 to cut the wire W; and a transmission mechanism 62 that moves the binding portion 7A (in this example, the movable The movement of the member 83 in the linear direction) is transmitted to the rotating blade 61 to rotate the rotating blade 61. The fixed blade portion 60 is configured by providing an edge portion capable of cutting the wire W in an opening through which the wire W passes. In this example, the fixed blade portion 60 is constituted by the side-by-side guide 4A arranged at the cutting and discharging position P3.

The rotating blade portion 61 cuts the metal wire W passing through the side-by-side guide 4A of the fixed blade portion 60 by a rotation operation with the shaft 61 a as a fulcrum. The transmission mechanism 62 is displaced in conjunction with the movement of the binding portion 7A, and after the wire W is wound around the steel bar S, the rotating blade portion 61 is rotated in accordance with the timing of twisting the wire W, and the wire W is cut.

The binding portion 7A is an example of a binding member, and includes: a grip portion 70 to hold the wire W; and a bending portion 71 to bend one end WS side and the other end WE side of the wire W held by the grip 70 Rebar S side.

The grasping portion 70 is an example of a grasping member, and as shown in FIG. 2, it includes a fixed grasping member 70C, a first movable grasping member 70L, and a second movable grasping member 70R. The first movable holding member 70L and the second movable holding member 70R are provided in the left-right direction through the fixed holding member 70C. Specifically, the first movable holding member 70L is arranged on one side in the axial direction of the wound wire W with respect to the fixed holding member 70C. The second movable holding member 70R is arranged on the other side.

The first movable gripping member 70L is displaceable in the direction in which it is separated and disconnected from the fixed gripping member 70C. The second movable gripping member 70R is displaceable in the direction in which it is separated and disconnected from the fixed gripping member 70C.

The grasping portion 70 is moved in a direction away from the fixed grasping member 70C by the first movable grasping member 70L, thereby forming a path through which the wire W passes between the first movable grasping member 70L and the fixed grasping member 70C. In contrast to this, by moving the first movable holding member 70L in a direction approaching the fixed holding member 70C, the wire W is held between the first movable holding member 70L and the fixed holding member 70C.

In addition, the grasping portion 70 is moved in a direction away from the fixed grasping member 70C by the second movable grasping member 70R, thereby forming a path through which the wire W passes between the second movable grasping member 70R and the fixed grasping member 70C. In contrast to this, by moving the second movable holding member 70R in a direction approaching the fixed holding member 70C, the wire W is held between the second movable holding member 70R and the fixed holding member 70C.

The wire W transported by the first feeding gear 30L and the second feeding gear 30R and passing through the side-by-side guide 4A at the cutting and discharging position P3 passes between the fixed holding member 70C and the second movable holding member 70R and is It is induced to the curl guide 5A. The wire W wound up by the crimping guide 5A passes between the fixed holding member 70C and the first movable holding member 70L.

Thereby, the holding member that fixes the pair of holding member 70C and the first movable holding member 70L constitutes the first holding part and holds the one end WS side of the wire W. In addition, the fixed gripping member 70C and the second movable gripping member 70R constitute a second gripping portion, and grip the other end WE side of the wire W cut by the cutting portion 6A.

Figures 6A and 6B are structural diagrams of the main parts of the grip of this embodiment. The first movable gripping member 70L has a convex portion 70Lb protruding in the direction of the fixed gripping member 70C on the surface facing the fixed gripping member 70C. On the other hand, the fixed gripping member 70C has a concave portion 73 into which the convex portion 70Lb of the first gripping member 70L enters on the surface facing the first gripping member 70L. Therefore, when the first movable gripping member 70L and the fixed gripping member 70C grip the wire W, the wire W is bent toward the first gripping member 70L.

Specifically, the fixed gripping member 70C includes a preliminary bending portion 72. The preliminary bending portion 72 is provided on the surface of the fixed gripping member 70C facing the first movable gripping member 70L, at the downstream end along the feeding direction of the wire W sent in the forward direction, and is provided facing the first movable It is comprised by grasping the convex part which protrudes in the direction of 70 L of members.

The grasping portion 70 grasps the wire W between the fixed grasping member 70C and the first movable grasping member 70L. In order to prevent the grasped wire W from falling off, the fixed grasping member 70C is provided with a convex portion 72b and a concave portion 73. The convex portion 72b is provided on the surface of the fixed gripping member 70C facing the first movable gripping member 70L, and is located at the upstream end along the feeding direction of the wire W sent in the positive direction, and faces the first movable gripping member 70L The direction is prominent. The concave portion 73 is provided between the preliminary bending portion 72 and the convex portion 72b, and is formed in a concave shape in the opposite direction to the first movable gripping member 70L.

The first movable gripping member 70L has a concave portion 70La into which the preliminary bent portion 72 of the fixed gripping member 70C enters, and a convex portion 70Lb that enters the concave portion 73 of the fixed gripping member 70C.

Thereby, as shown in FIG. 6B, the wire W is pressed by the preliminary bending portion 72 during the operation of gripping the one end WS side of the wire W between the fixed gripping member 70C and the first movable gripping member 70L. On the side of the first movable holding member 70L, one end WS of the wire W is bent in a direction away from the wire W held by the fixed holding member 70C and the second movable holding member 70R.

The fixed gripping member 70C and the second movable gripping member 70R grip the wire W, including a state where the wire W can move freely to some extent between the fixed gripping member 70C and the second movable gripping member 70R. This is because the wire W must be able to move between the fixed gripping member 70C and the second movable gripping member 70R during the operation of winding the wire W around the steel bar S.

The bent portion 71 is an example of a bending member, and the wire W is bent so that the end of the wire W after the bundle is positioned closer to the top of the wire W that protrudes in the direction away from the bundle Bundle side. The bending portion 71 includes: fulcrum portions (drop-off prevention portions described later) 75 and 76, which serve as bending fulcrums when the wire W is bent; Bend the wire W for the fulcrum. In addition, in this example, the bending portion 71 bends the wire W held by the holding portion 70 before the holding portion 70 twists the wire W.

The bent portions 71 a and 71 b are provided around the grasping portion 70 so as to cover a part of the grasping portion 70, and are movable along the axial direction of the grasping portion 70. Specifically, the bent portions 71a and 71b can approach the one end WS side of the wire W held by the fixed holding member 70C and the first movable holding member 70L, and the metal held by the fixed holding member 70C and the second movable holding member 70R The other end WE side of the wire W moves in the direction of the one end WS side and the other end WE side of the bent wire W, and the direction away from the bent wire W, that is, the front-rear direction.

The bent portion 71a can be moved in the forward direction indicated by the arrow F, and the fixed holding member 70C and the first movable holding member 70L are held by the one end WS of the wire W, with the supporting point 75 at the holding position as the supporting point. Bend to the S side of the steel bar. In addition, the bent portion 71b can move the other end WE of the wire W held by the fixed holding member 70C and the second movable holding member 70R to the fulcrum of the holding position by moving in the forward direction indicated by the arrow F. 76 is the fulcrum and bends to the S side of the steel bar.

The wire W is bent by the movement of the bending portions 71a and 71b, and the wire W between the second movable holding member 70R and the fixed holding member 70C is pushed by the bending portion 71b, and the wire W is restrained from being removed from the fixed holding member. The gap between 70C and the second movable holding member 70R falls off.

The binding portion 7A includes a length restricting portion 74 that restricts the position of the one end portion WS of the wire W. The length restricting portion 74 is configured by providing a member in contact with one end portion WS of the wire W on the feeding path of the wire W passing between the fixed gripping member 70C and the first movable gripping member 70L. In order to ensure a predetermined distance from the holding position of the wire W held by the fixed holding member 70C and the first movable holding member 70L, the length restricting portion 74 is provided in the first guide portion 50 of the crimping guide portion 5A in this example.

The reinforcing bar binding machine 1A includes a binding section driving mechanism 8A that drives the binding section 7A. The binding section driving mechanism 8A includes: a motor 80; a rotating shaft 82 that is driven by the motor 80 through a speed reducer 81 that performs deceleration and torque amplification; a movable member 83 that is displaced by the rotation of the rotating shaft 82; and rotation restriction The member 84 restricts the rotation of the movable member 83 linked to the rotation of the rotating shaft 82.

The rotation of the rotating shaft 82 and the movable member 83 is converted into the front-rear direction of the movable member 83 along the rotating shaft 82 by the threaded portion provided on the rotating shaft 82 and the nut portion provided on the movable member 83. Mobile.

The movable member 83 holds the wire in the grip 70 and the bending portion 71 bends the wire W, and is engaged with the rotation restricting member 84, thereby moving forward and backward while being restricted by the rotation restricting member 84. direction. In addition, the movable member 83 can be rotated by the rotating operation of the rotating shaft 82 by disengaging the engagement of the rotation restricting member 84.

In this example, the movable member 83 is connected to the first movable holding member 70L and the second movable holding member 70R via a cam not shown. The end driving mechanism 8A converts the movement of the movable member 83 in the front-to-rear direction into the movement of displacing the first movable holding member 70L in the direction of separation and contact with the fixed holding member 70C, and the displacement of the second movable holding member 70R with respect to the fixed holding member 70L. The gripping member 70C moves in the separation and connection direction.

In addition, the binding portion drive mechanism 8A converts the rotation movement of the movable member 83 into the rotation movement of the fixed gripping member 70C, the first movable gripping member 70L, and the second movable gripping member 70R.

In addition, in the binding portion driving mechanism 8A, the bending portion 71 is provided integrally with the movable member 83, and the movement of the movable member 83 in the front-rear direction causes the bending portion 71 to also move in the front-rear direction.

The aforementioned retracting mechanism 53 a of the guide pin 53 is constituted by an interlocking mechanism that converts the movement of the movable member 83 in the front-rear direction into the displacement of the guide pin 83. In addition, the transmission mechanism 62 of the rotating blade portion 61 is constituted by an interlocking mechanism that converts the movement of the movable member 83 in the front-rear direction into the rotation operation of the rotating blade portion 61.

The reinforcing bar binding machine 1A of the present embodiment is a type that an operator can use by hand, and includes a main body portion 10A and a grip portion 11A. The reinforcing bar binding machine 1A has a binding portion 7A and a binding portion driving mechanism 8A built in a main body portion 10A, and includes a crimp guide portion 5A on one end side of the main body portion 10A in the longitudinal direction (first direction Y1). In addition, the grip portion 11A is provided so as to protrude from the other end side of the main body portion 10A in the longitudinal direction toward a direction (second direction Y2) that is slightly perpendicular (intersecting) the longitudinal direction. In addition, a wire feeding portion 3A is provided on the side along the second direction Y2 of the binding portion 7A. A magazine 2A is provided on the side of the wire feeding portion 3A along the second direction Y2.

Thereby, the magazine 2A is provided on the side along the first direction Y1 of the grip portion 11A. The grip portion 11A is provided with a trigger 12A on one side along the first direction Y1. In response to the state of the switch 13A pressed by the operation of the trigger 12A, the control portion 14A controls the feed motor 33a and the motor 80. In addition, the battery 15A is detachably attached to the end portion of the grip portion 11A along the second direction Y2. >Operation example of the reinforcing bar binding machine of this embodiment>

Figures 7 to 14 are diagrams for explaining the operation of the reinforcing bar binding machine 1A of the present embodiment. Figures 15A, 15B, and 15C are explanatory diagrams of the action of winding the metal wire on the rebar. In addition, FIG. 16A, FIG. 16B, and FIG. 16C are diagrams for explaining the operation of bending the coil. Next, referring to the drawings, the operation of the reinforcing bar binding machine 1A of the present embodiment to bind the reinforcing bars S with the wire W will be described.

Fig. 7 shows the origin state, that is, the initial state where the wire W has not been sent out by the wire feeding portion 3A. In the origin state, the tip of the wire W stands by at the cutting and discharging position P3. As shown in Fig. 15A, the wire W waiting at the cutting and discharging position P3, in this example two wires W, will pass the side-by-side guide 4A (fixed blade 60) provided at the cutting and discharging position P3 , And side by side in the established direction.

Even if the wire W between the discharge position P3 and the magazine 2A is cut, it passes through the side-by-side guide 4A at the intermediate position P2 and the side-by-side guide 4A at the introduction position P1, the first feed gear 30L, and the second feed gear 30R. , Will also be side by side in the established direction.

Figure 8 shows the state where the wire W is wound around the steel bar S. Put the steel bar S between the first guide 50 and the second guide 51 of the crimp guide 5A. When the trigger 12A is operated, the feed motor 33a is driven in the forward rotation direction, and the first feed gear 30L It rotates forward, and following the first feed gear 30L, the second feed gear 30R also rotates forward.

Thereby, the friction force between the first feed gear 30L and one wire W1, the friction force between the second feed gear 30R and the other wire W2, and the friction force between the one wire W1 and the other wire W1 The friction generated between one wire W2 pushes the two wires W in the positive direction.

In the feeding direction of the wire W that is pushed in the forward direction, the upstream side and the downstream side of the wire feeding portion 3A are respectively provided with side-by-side guides 4A, thereby entering the first feeding of the first feeding gear 30L The two wires W between the groove portion 32L and the second feed groove portion 32R of the second feed gear 30R, and the two wires W discharged from the first feed gear 30L and the second feed gear 30R are arranged in a row The state in the given direction is sent.

When the wire W is fed in the positive direction, the wire W passes between the fixed holding member 70C and the second movable holding member 70R, and passes through the guide groove 52 of the first guide part 50 of the crimp guide part 5A. In this way, the wire W is bent and wound around the steel bar S. The two wires W introduced into the first guide portion 50 are held in a side-by-side state by the side-by-side guide 4A at the cut and discharge position P3. In addition, since the two wires W are transported while being pressed against the outer wall surface of the guide groove 52, the wires W passing through the guide groove 52 can also be maintained in a state of being arranged in a predetermined direction.

The wire W sent by the first guide portion 50 is restricted by the movable guide portion 55 of the second guide portion 51 to move along the axis direction Ru1 of the loop Ru formed by the wound wire W, and is fixedly guided. The portion 54 restricts the movement in the radial direction of the ring Ru, and is induced between the fixed gripping member 70C and the first movable gripping member 70L. Then, when the wire W is sent to the position where the tip end hits the length restricting portion 74, the driving of the feed motor 33a is stopped.

Thereby, the metal wire W is wound around the steel bar S in a loop shape. At this time, the two metal wires W wound around the steel bar S are kept in a state of being side by side without twisting each other as shown in FIG. 15B.

FIG. 9 shows the state where the wire W is gripped by the gripping portion 70. As shown in FIG. After stopping the feeding of the wire W, the motor 80 is driven in the forward rotation direction, whereby the motor 80 moves the movable member 83 in the forward direction (the arrow F direction). That is, the rotation movement of the movable member 83 in conjunction with the rotation of the motor 80 is restricted by the rotation restricting member 84, and the rotation of the motor 80 is converted into linear movement. Thereby, the movable member 83 moves in the forward direction. In conjunction with the movement of the movable member 83 in the forward direction, the first movable gripping member 70L is displaced in a direction approaching the fixed gripping member 70C, and grips the one end WS side of the wire W.

In addition, the movement of the movable member 83 in the forward direction is transmitted to the retreat mechanism 53a, so that the guide pin 53 retreats from the path along which the wire W moves.

Figure 10 shows the state where the wire W is wound tightly to the steel bar S. After the one end WS side of the wire W is gripped between the first movable gripping member 70L and the fixed gripping member 70C, the feed motor 33a is driven in the reverse rotation direction to reverse the rotation of the first feed gear 30L, and The second feed gear 30R follows the first feed gear 30L and rotates in the reverse direction.

Thereby, the two wires W are pulled back to the direction of the magazine 2A and sent to the opposite direction. By the action of feeding the wire W in the reverse direction, the wire W is wound and closely attached to the steel bar S. In this example, as shown in Fig. 15C, the two wires are arranged side by side, so the action of feeding the wires W in the opposite direction can suppress the increase in the feed resistance caused by twisting between the wires W. Also, as in the case of using one wire to bundle the rebar S in the conventional technology, and as in the case of using two wires W to bundle the rebar S in this example, when it is desired to obtain the same bundle strength, use two pieces of metal One of the wires W can make the diameter of each metal wire W thinner. Therefore, it is easy to bend the metal wire W, and the metal wire W can be closely attached to the steel bar S with a small force. In this way, the wire W can be closely attached to the steel bar S with a small force. In addition, since two wires W with a small diameter are used, it is easy to bend the wire W into a loop shape, and it is possible to try to reduce the load when the wire W is cut. Along with this, the downsizing of each motor of the reinforcing bar binding machine 1A and the downsizing of the mechanism parts enable the entire main body to be downsized. In addition, due to the downsizing of the motor and the reduction in load, it is possible to reduce power consumption.

Figure 11 shows the state of the wire W being cut. After the wire W is wound around the steel bar S and the feeding of the wire W is stopped, the motor 80 is driven in the forward rotation direction, thereby moving the movable member 83 in the forward direction. In conjunction with the movement of the movable member 83 in the forward direction, the second movable holding member 70R is displaced in a direction approaching the fixed holding member 70C, and the wire W is held. In addition, the movement of the movable member 83 in the forward direction is transmitted to the cutting portion 6A by the transmission mechanism 62, and the other end WE side of the wire W held by the second movable holding member 70R and the fixed holding member 70C is received by the rotating blade 61 The action is cut off.

Figure 12 shows the state where the end of the wire W is bent to the side of the steel bar S. After the wire W is cut, the movable member 83 is moved further forward, whereby the bent portions 71 a and 71 b of the bent portion 71 move forward together with the movable member 83.

The bent portion 71a, as shown in FIGS. 16B and 16C, moves in the forward direction indicated by the arrow F, that is, in the direction approaching the steel bar S, and is held by the fixed gripping member 70C and the first movable gripping member 70L One end of the wire W is in contact with the WS side. In addition, the bent portion 71b can be moved in the forward direction indicated by the arrow F, that is, in the direction approaching the steel bar S, and the other end WE of the wire W held by the fixed holding member 70C and the second movable holding member 70R Side contact.

The bent portion 71a moves a predetermined distance in the forward direction indicated by the arrow F, and the one end WS side of the wire W held by the fixed holding member 70C and the first movable holding member 70L can be pressed toward the steel bar S side, and the supporting point 75 For the fulcrum, bend to the side of the steel bar S.

The fulcrum portion 75 is provided in the grip portion 70 as shown in FIGS. 16A and 16B. The grasping portion 70 is provided with a fall prevention portion 75 protruding in the direction of fixing the grasping member 70C on the front end side of the first movable grasping member 70L. In this example, the falling prevention part 75 also functions as a fulcrum part 75. Therefore, the one end WS of the wire W held by the fixed holding member 70C and the first movable holding member 70L will move in the forward direction indicated by the arrow F due to the bending portion 71a, and the fixed holding member 70C and the first movable holding member 70C The gripping position constituted by the gripping member 70L is bent to the side of the steel bar S with the fall prevention portion (fulcrum portion) 75 as a fulcrum. In addition, in Figure 16B, the second movable gripping member 70R is not shown.

The bent portion 71b moves a predetermined distance in the forward direction indicated by the arrow F, and the other end WE of the wire W held by the fixed holding member 70C and the second movable holding member 70R can be pressed to the side of the steel bar S with the support point. 76 is the fulcrum and bends to the S side of the steel bar.

The fulcrum part 76 is provided in the holding part 70 as shown in FIG. 16A and FIG. 16B. The grasping portion 70 is provided with a fall prevention portion 76 that protrudes in the direction of fixing the grasping member 70C on the front end side of the second movable grasping member 70R. In this example, the falling prevention part 76 also functions as the fulcrum part 76. Therefore, the other end WE of the wire W gripped by the fixed gripping member 70C and the second movable gripping member 70R will move in the forward direction indicated by the arrow F due to the bending portion 71b. The gripping position constituted by the movable gripping member 70R has the fall prevention portion (support point portion) 76 as a fulcrum, and is bent to the side of the steel bar S. In addition, in Figure 16C, the first movable gripping member 70L is not shown.

Figure 13 shows the state of the twisted wire W. After the end of the wire W is bent to the side of the steel bar S, the motor 80 is further driven in the positive rotation direction, and the motor 80 moves the movable member 83 further forward (the arrow F direction). When the movable member 83 moves to a predetermined position in the arrow F direction, the movable member 83 is disengaged from the engagement with the rotation restricting member 84, and the rotation restriction of the movable member 83 by the rotation restricting member 84 is released. In this way, when the motor 80 is driven in the positive rotation direction, the grip 70 holding the wire W rotates, and the wire W is twisted. The grip 70 is biased backward by a spring not shown, and twists the wire while applying tension to the wire. In this way, the metal wire W does not slack, and the steel bar S is bound by the metal wire W.

Figure 14 shows the state of the wire W leaving the twist. After the wire W is twisted, the motor 80 is driven in the reverse rotation direction, and the motor 80 moves the movable member 83 in the rear direction indicated by the arrow R. That is, the rotation movement of the movable member 83 linked to the rotation of the motor 80 is restricted by the rotation restriction member 84, and the rotation of the motor 80 is converted into linear movement. In this way, the movable member 83 moves in the backward direction. In conjunction with the movement of the movable member 83 in the backward direction, the first movable holding member 70L and the second movable holding member 70R are displaced in a direction away from the fixed holding member 70C, and the holding portion 70 loosens the wire W. In addition, when the bundling of the steel bars S is completed and the steel bars S are to be pulled out from the steel bar binding machine 1A, in the conventional technique, the steel bars S are caught by the crimping guide and difficult to be pulled out, which deteriorates the workability. On the other hand, the movable guide portion 55 of the second guide portion 51 is configured to be rotatable in the arrow H direction, and when the steel bar S is pulled out from the reinforcing bar binding machine 1A, the movable guide portion 55 of the second guide portion 51 It will not get stuck to the steel bar S, and the workability will be improved. >Examples of functions and effects of the reinforcing bar binding machine of this embodiment>

Figure 17A is an example of the effect of the reinforcing bar binding machine of this embodiment. Figure 17B is an example of the functions and problems of the conventional steel bar tying machine. Hereinafter, the type of the wire W for binding the reinforcing steel S will be described using an example of the effect of the reinforcing steel binding machine of the present embodiment in comparison with the conventional one.

As shown in FIG. 17B, the metal wire W bundled on the steel bar S by the conventional steel bar binding machine has one end WS and the other end WE of the metal wire W facing the opposite direction to the steel bar S. As shown in FIG. Thereby, in the wire W that binds the steel bar S, the one end WS and the other end WE of the metal wire W on the tip side of the twisted portion protrude significantly from the steel bar S. When the front end side of the wire W protrudes greatly, the protruding part may hinder the operation and become an obstacle to the operation.

Also, after the steel bar S is bundled, the concrete 200 flows into the place where the steel bar S is laid, but at this time, in order to prevent one end WS and the other end WE of the wire W from protruding from the concrete 200, the steel wire W is bound to the steel wire W In the example shown in Figure 17B, the thickness between the end WS of the wire W and the surface 201 of the concrete 200 must be maintained at a predetermined size S1. Therefore, in the configuration where the one end WS and the other end WE of the wire W face in the direction opposite to the steel bar S, the thickness S12 from the laying position of the steel bar S to the surface 201 of the concrete 200 becomes thicker. .

In contrast, in the reinforcing bar binding machine 1A of the present embodiment, by the bending portion 71, the wire W is bent such that the one end WS of the wire W wound around the reinforcing bar S is positioned at a distance higher than the wire W. The bending part (the first bending part WS1) is closer to the rebar S, and the other end WE of the wire W wound around the rebar S will be located more than the bending part of the wire W (the second bending part WE1) Lean on the S side of the steel bar. In the reinforcing bar binding machine 1A of this embodiment, when the bending portion 71 bends the wire W, the wire W is bent by the preliminary bending portion 72 during the operation of the first movable holding member 70L and the fixed holding member 70C to hold the wire W And the part where the fixed holding member 70C and the second movable holding member 70R are bent during the action of winding the wire W around the steel bar S, one of the two will become the wire W in the direction away from the steel bar S On the most prominent top. That is, in the present embodiment, at least one of the bent portions of the one end WS side and the other end WE side of the wire W of the reinforcing steel S will become the top.

As a result, the wire W bundled to the reinforcing bar S by the reinforcing bar binding machine 1A of this embodiment is shown in FIG. 17A. The bending part WS1 is formed between the twisting part WT and the one end part WS, and the one end part WS of the wire W is located on the side of the steel bar S rather than the 1st bending part WS1. In addition, the other end WE side of the wire W is bent to the side of the steel bar S, so that the second bending part WE1 is formed between the twisted part WT and the other end WE, and the other end WE of the wire W is located more than The second bending part WE1 is closer to the steel bar S side.

In the example shown in Figure 17A, the wire W is formed with two bending parts, in this example the first bending part WS1 and the second bending part WE1, in which one of the wire W bundled with the steel bar S The first bending part WS1 that protrudes farthest away from the steel bar S (the opposite direction to the steel bar S) forms the top Wp. Then, neither of the one end WS and the other end WE of the wire W will protrude in the opposite direction of the steel bar S beyond the top Wp.

In this way, the one end WS and the other end WE of the wire W do not protrude in the opposite direction of the steel bar S beyond the top Wp formed by the bent portion of the wire W, thereby preventing the end of the wire W from protruding. The resulting decrease in workability. In addition, one end WS of the wire W is bent to the side of the steel bar S, and the other end of the wire W is also bent to the side of the steel bar S, so the tip of the wire W protruding outward from the twisted part WT The amount of protrusion on the side is less than that of the conventional technology. Therefore, compared with the conventional technology, the thickness S2 between the laying position of the steel bar S and the surface 201 of the concrete 200 can be reduced, and the amount of concrete used can be reduced.

In the reinforcing bar binding machine 1A of this embodiment, the wire W is wound around the reinforcing bar S during the forward direction of the wire W, and one end WS of the wire W is wound around the reinforcing bar S during the reverse direction of the wire W. On the other hand, in a state of being held by the fixed holding member 70C and the first movable holding member 70L, the bending portion 71 is bent to the reinforcing bar S side. In addition, the other end WE side of the wire W cut by the cutting portion 6A will be bent to the steel bar S side by the bending portion 71 while being held by the fixed holding member 70C and the second movable holding member 70R. .

As a result, as shown in FIG. 16B, the wire W can be bent by using the gripping position formed by the fixed gripping member 70C and the first movable gripping member 70L as the fulcrum 71c1. As shown in FIG. 16C, the wire W can be bent using the holding position formed by the fixed holding member 70C and the second movable holding member 70R as the fulcrum 71c2. Moreover, the bending part 71 can apply the force which pushes the wire W toward the steel bar S direction by displacing the bending parts 71a, 71b in the direction approaching the steel bar S.

In this way, in the reinforcing bar binding machine 1A of this embodiment, the wire W is tightly gripped at the gripping position, and the wire W is bent using the bending parts 71a, 71b and the supporting points 75, 76 with the supporting points 71c1 and 71c2 as supporting points. Therefore, without dispersing the force of pressing the wire W in other directions, it is possible to reliably bend the ends WS and WE of the wire W in the desired direction (the side of the steel bar S).

In contrast to this, for example, in a conventional binding machine that applies a force in the direction of twisting the wire W without holding the wire W, it is possible to bend the end of the wire W in the twisting direction. However, since the force of bending the wire W is applied without holding the wire W, the direction of bending the wire W is not fixed, and the end of the wire W may also face the opposite outside of the steel bar S.

However, in this embodiment, as described above, the wire W is tightly gripped at the gripping position, and the wire W can be bent with the supporting points 71c1 and 71c2 as the supporting points by using the bending parts 71a, 71b and the supporting point parts 75, 76 to bend the wire W reliably. Ground the ends WS and WE of the wire W to the side of the steel bar S.

Also, after the twisted wire W is bundled with the reinforcing bar S, when the end of the wire W is to be folded toward the reinforcing bar S, the bundled portion of the twisted wire W may become loose and the bundle strength may decrease. In addition, after the twisted wire W is bundled with the reinforcing bar S, when a further force is applied in the direction of the twisted wire W to bend the end of the wire, the bundled part of the twisted wire W may be damaged. .

On the other hand, in the present embodiment, the wire is bent while holding the wire, so the bundled portion of the twisted wire W does not become loose, and the bundle strength does not decrease. In addition, a better form is to bend the wire W before the twisted wire W is bundled with the steel bar S. Therefore, after the twisted wire W is bundled with the steel bar S, no further application of the twisted wire W will be applied. Because of the force in the direction of W, the bundled part of the twisted wire W will not be damaged.

Also, before twisting the wire W to bundle the reinforcing bar S, the one end WS side and the other end WE side of the wire W are bent toward the reinforcing bar S side. Therefore, even if the movement of the twisting wire W is halfway due to some abnormality, When it stops, the end of the wire W is already facing the steel bar S side.

Figures 18A and 19A are examples of functions and effects of the reinforcing bar tying machine of this embodiment, and Figs. 18B and 19B are examples of functions and problems of the conventional rebar tying machine. Hereinafter, regarding the prevention of the wire W from falling off the holding portion by the action of winding the wire W to the reinforcing bar S, an example of the effect of the reinforcing bar binding machine of the present embodiment compared with the conventional one will be described.

As shown in Figure 18B, the conventional gripping portion 700 of the reinforcing bar binding machine includes a fixed gripping member 700C, a first movable gripping member 700L, and a second movable gripping member 700R, and a wire W that is wound around the steel bar S The length restricting portion 701 to be resisted is designed in the first movable holding member 700L.

The metal formed by the fixed gripping member 700C and the first movable gripping member 700L during the action of feeding (pulling back) the wire W in the opposite direction and winding it around the steel bar S and the action of twisting the wire W with the grip 700 If the distance N2 between the grasping position of the wire W and the length restricting portion 701 is short, the wire W grasped by the fixed grasping member 700C and the first movable grasping member 700L is likely to fall off.

In order to prevent the gripped wire from falling off, the distance N2 may be designed to be long. For this reason, the distance between the gripping position of the wire W in the first movable gripping member 700L and the length restricting portion 701 must be increased.

However, if the distance between the grasping position of the wire W in the first movable grasping member 700L and the length restricting portion 701 is increased, the first movable grasping member 700L will increase in size. Therefore, in the conventional structure, the distance N2 from the gripping position of the wire W formed by the fixed gripping member 700C and the first movable gripping member 700L to the one end WS side of the wire W cannot be increased.

Relative to this. In the grip 70 of this embodiment, as shown in FIG. 18A, the length restriction portion 74 to which the wire W abuts is made as a separate part from the first movable grip 70L.

Thereby, without increasing the size of the first movable holding member 70L, the distance N1 between the holding position of the wire W in the first movable holding member 70L and the length restricting portion 74 can be increased.

Therefore, even if the first movable holding member 70L is not enlarged, the action of feeding the wire W in the opposite direction to tighten the steel bar S and the action of twisting the wire W by the holding portion 70 can suppress the holding member 70C from being fixed. And the wire W gripped by the first movable gripping member 70L falls off.

In addition, the conventional gripping portion 700 of the reinforcing bar binding machine is shown in FIG. 19B. On the surface of the first movable gripping member 700L facing the fixed gripping member 700C, there are provided convex portions protruding in the direction of the fixed gripping member 700C and The recessed portion into which the gripping member 700C enters is fixed, and the preliminary bending portion 702 is formed.

Thereby, the action of gripping the wire W with the first movable holding member 700L and the fixed holding member 700C will remove the end WS of the wire W protruding from the holding position formed by the first movable holding member 700L and the fixed holding member 700C. By bending the side and sending the wire W in the opposite direction to tighten the steel bar S, and twisting the wire W with the grip 700, the effect of preventing the wire W from falling off can be obtained.

However, the one end WS side of the wire W is bent toward the inner side of the wire W passing between the fixed holding member 700C and the second movable holding member 700R, so the one end WS side of the bent wire W has It is possible to come into contact with the wire W sent in the opposite direction because the steel bar S needs to be wound up, and get caught.

If one end WS side of the bent wire W is wound into the wire W that is fed in the opposite direction because the steel bar S is to be tightened, the winding of the wire W may become unstable, and the wire W The twisting may also become unreliable.

In contrast, in the grip 70 of this embodiment, as shown in FIG. 19A, a convex portion protruding in the direction of the first movable grip 70L is provided on the surface of the fixed grip 70C facing the first movable grip 70L. And the recessed portion into which the first movable gripping member 70L enters forms the preliminary bending portion 72.

Thereby, the action of gripping the wire W with the first movable holding member 70L and the fixed holding member 70C will cause the end WS of the wire W protruding from the holding position formed by the first movable holding member 70L and the fixed holding member 70C. Side bending, the convex part formed in the preliminary bending part 72 of the fixed holding member 70C, the convex part formed in the first movable holding member 70L that enters the concave part of the preliminary bending part 72, and the other convex part of the fixed holding member 70C At these three points, the one end WS side of the wire W is clamped. Thereby, the action of feeding the wire W in the reverse direction to tighten the steel bar S and the action of twisting the wire W with the grip 70 can achieve the effect of preventing the wire W from falling off.

Then, the one end WS side of the wire W is bent to the outside in the opposite direction to the wire W passing between the fixed gripping member 70C and the second movable gripping member 70R, so that the bending of the wire W can be suppressed. The one end WS side comes into contact with the wire W sent in the reverse direction because the steel bar S is to be wound up.

Thereby, the action of feeding the wire W in the reverse direction to tighten the steel bar S prevents the wire W from falling off the holding portion 70, and the winding of the wire W is surely performed, and the action of twisting the wire W will surely perform the metal Bundle of silk W.

Figures 20A, 20B, and 21A are examples of the effects of the reinforcing bar tying machine of this embodiment, and Figs. 20C, 20D, and 21B are the functions and problems of the conventional steel bar tying machine. example. Hereinafter, with regard to the operation of bundling the reinforcing bars S with the wire W, an example of the effect of the reinforcing bar bundling machine of the present embodiment compared with the conventional technology will be described.

As shown in Fig. 20C, in the conventional structure in which a wire Wb having a predetermined diameter (for example, about 1.6 mm to 2.5 mm) is wound around the steel bar S, as shown in Fig. 20D, the rigidity of the steel bar Wb is high. Therefore, if the metal wire Wb is wound on the steel bar S without a considerable force, the metal wire Wb will loosen J during the action of winding the metal wire Wb, and a gap will be generated between the metal wire Wb and the steel bar S.

On the other hand, as shown in FIG. 20A, two metal wires W having a diameter smaller than that of the conventional technique (for example, about 0.5 mm to 1.5 mm) are wound tightly around the steel bar S in this embodiment, as shown in FIG. 20B As shown, the rigidity of the wire W is lower than that of the conventional technology. Therefore, even if the wire W is wound on the steel bar S with a force lower than that of the conventional technology, the wire W will still be restrained in the action of winding the wire W. The slack is generated, and the linear portion K is surely wound around the steel bar S. Here, considering the function of the wire W to bundle the reinforcing bars S, the rigidity of the wire W varies not only due to the diameter of the wire W, but also due to differences in materials. For example, in this embodiment, a wire W with a diameter of about 0.5mm to 1.5mm is taken as an example. However, considering the material of the wire W, the lower limit and upper limit of the diameter of the wire W It is also possible that the value will at least produce a difference of the degree of tolerance.

Also, as shown in Figure 21B, in the conventional structure in which a wire Wb with a predetermined diameter is wound and twisted on the steel bar S, the steel bar Wb has high rigidity, so even if the wire Wb is twisted, it is The slack of the wire Wb is not eliminated, and a gap L is generated between the wire Wb and the steel bar S.

On the other hand, as shown in FIG. 21A, compared with the conventional technique, two metal wires W with a smaller diameter are twisted and twisted around the steel bar S. The rigidity of the metal wire W is higher than that of the conventional technique. Therefore, by twisting the wire W, at least the gap M with the steel bar S can be suppressed compared with the conventional technique, and the bundle strength of the wire W can be improved.

Then, by using two wires W, it is possible to make the reinforcing force holding force equal to that of the conventional technique, and to suppress the deviation between the bundled reinforcing bars S. In this embodiment, two metal wires are sent out at the same time, and the two metal wires W sent out at the same time are used to bind the steel bar S. Here, the so-called sending out two wires at the same time refers to the situation when one wire W and the other wire W are sent out at approximately the same speed, that is, the relative speed of one wire is slightly relative to that of the other wire. It is equal to 0, but in this example, it is not necessarily limited to this meaning. For example, even if one wire W and the other wire W are fed at different speeds (time points), the two wires W are adjoining side by side on the feeding path of the wire W, and the wires W are side by side. If it is wound on the steel bar S in the state, it can be regarded as sending two wires at the same time. In other words, the total area of the sum of the cross-sectional areas of the two metal wires W is the main factor determining the reinforcing force of the steel bar. Therefore, even if the timing of sending out the two wires is staggered, the same result is ensured in terms of the reinforcing force retention. However, compared to the action of staggering the timing of sending out the two wires W, the action of sending out the two wires W at the same time can shorten the time required for feeding, so the method of sending out the two wires W at the same time can finally be improved. Bundling speed. >Modifications of the reinforcing bar binding machine of this embodiment type>

The steel bar binding machine 1A of this embodiment uses a structure of two metal wires W as an example, but one metal wire W can also be used to bind the steel bar S, or two or more metal wires W can be used as an example. Bundle rebar S. In addition, the reinforcing bar binding machine 1A of this embodiment has a structure in which the first guide portion 50 of the crimping guide portion 5A is provided with the length restricting portion 74, but if it is independent of the gripping portion 70 such as the first movable gripping member 70L As for the parts, they may be arranged in other places, for example, in a structure supporting the grip 70.

In addition, the reinforcing bar binding machine 1A of this embodiment uses the bending portion 71 to bend one end WS side and the other end WE side of the wire W toward the reinforcing bar S, and then twist it by the rotation of the grip 70 The wire W is twisted, but it is also possible to start twisting the wire W before the action of bending the wire W ends. In addition, the wire W may be bent after the turning operation of the grip 70 starts and the operation of twisting the wire W starts, and before the operation of twisting the wire W ends. In addition, after twisting the wire W (while maintaining the state of holding the wire W), the wire W may be bent.

In addition, as the bending member, although the structure in which the bending portion 71 and the movable member 83 are integrated has been described, it may be an independent structure. It may be a structure in which the grasping portion 70 and the bending portion 71 are driven by a driving member such as an independent motor. In addition, instead of the bent portion 71, the fixed gripping member 70C, the first movable gripping member 70L, and the second movable gripping member 70R may be provided as a bending member with a bent portion constituted by a concave-convex shape. The action of holding the wire W applies a force to bend the wire W to the side of the steel bar S.

FIG. 22A, FIG. 22B, and FIG. 22C are explanatory diagrams showing a modification of this embodiment. In the reinforcing bar binding machine 1A of the present embodiment, the bending part 71 positions the one end WS side of the wire W on the side of the reinforcing bar S than the first bending part WS1 of the wire W, and causes the wire W to be wound around the reinforcing bar. The other end WE side of the wire W around S is located closer to the steel bar S than the second bending part WE1 of the wire W. Then, in the example shown in Fig. 22A, the most protruding part in the opposite direction to the steel bar S, that is, the first bending part WS1, becomes the top part Wp, and the one end part WS and the other end part WE of the wire W It is sufficient that the top part Wp formed by the first bending part WS1 does not protrude in the opposite direction of the steel bar S. Therefore, as shown in FIG. 22A, for example, if the one end WS side of the wire W is bent to the reinforcing bar S side at the first bending location WS1, the one end WS side of the wire W may not face the reinforcing bar S side.

In addition, as shown in FIG. 22B, a bending member may be provided so that the first bending site WS2 and the second bending site WE2 have a curved shape. In this case, the most protruding part in the opposite direction to the steel bar S becomes the first bending part WS2, so the first bending part SW2 becomes the top part Wp, so that one end WS and the other end WE of the wire W do not exceed The top Wp formed by the first bending part WS2 protrudes in the opposite direction of the steel bar S.

Moreover, as shown in FIG. 22C, the one end WS side of the wire W is bent to the side of the reinforcing bar S so that the one end WS of the wire W is located on the side of the reinforcing bar S than the first bent portion WS1. In addition, the one end WE side of the wire W is bent to the side of the reinforcing bar S so that the other end WE of the wire W is located on the side of the reinforcing bar S than the second bending part WE1. Then, among the wires W that bundle the reinforcing bars S, the second bending part WE1 that protrudes most in the opposite direction to the reinforcing bars S can be the top Wp, and the one end WS and the other end WE of the wire W can be bent Neither of them protrudes beyond the top Wp to the opposite direction of the steel bar S.

FIG. 23A, FIG. 23B, FIG. 23C, FIG. 23D, and FIG. 23E are structural diagrams showing a modification of the side-by-side guidance of this embodiment. In a structure in which two or more wires W are used to bundle the reinforcing bars S, the cross-sectional shape of the opening 4BW of the side-by-side guide 4B shown in FIG. 23A is that of the opening 4BW in the direction perpendicular to the feeding direction of the wire W The cross-sectional shape is rectangular, and the long side direction and the short side direction of the opening 4BW are linear. The length L1 in the longitudinal direction of the opening 4BW of the side-by-side guide 4B has a diameter r and a slightly longer length than the diameter r of the plurality of wires W in the state where the wires W are arranged in the radial direction, and the length L2 in the short side direction has A length slightly longer than the diameter r of one wire W. In the side-by-side guide 4B, in this example, the length L1 in the longitudinal direction of the opening 4BW has a length slightly longer than the diameter r of the two wires W.

The longitudinal direction of the opening 4CW of the side-by-side guide 4C shown in FIG. 23B is linear, and the short-side direction is triangular. In order to allow the plurality of wires W to be arranged side by side in the long side direction of the opening 4CW and to guide the wire W with a slope in the short side direction, the length L1 of the long side direction of the opening 4CW is longer than the length L1 of the wire W along the long side of the opening 4CW. The diameter r and the slightly longer length of the plurality of wires W arranged in the radial direction. The length L2 in the short-side direction has a length slightly longer than the diameter r of one wire W.

The opening 4DW of the side-by-side guide 4D shown in FIG. 23C is curved into a curved shape protruding inward in the longitudinal direction, and an arc shape is formed in the short direction. That is, the opening shape of the opening 4DW forms a shape along the outer shape of the wires W side by side. The length L1 in the longitudinal direction of the opening 4DW of the side-by-side guide 4D is slightly longer than the diameter r and the length of the plurality of wires W in a state where the wires W are arranged in the radial direction. The length L2 in the short-side direction has a length slightly longer than the diameter r of one wire W. In the side-by-side guide 4D, in this example, the length L1 in the longitudinal direction is slightly longer than the diameter r of the two wires W.

The opening 4EW of the side-by-side guide 4E shown in FIG. 23D is curved into a curved shape protruding outward in the long side direction, and the short side direction forms an arc shape. That is, the opening shape of the opening 4EW forms an elliptical shape. The length L1 in the longitudinal direction of the opening 4EW of the side-by-side guide 4E is slightly longer than the diameter r and the length of the plurality of wires W in a state where the wires W are arranged in the radial direction. The length L2 in the short-side direction has a length slightly longer than the diameter r of one wire W. In the side-by-side guide 4E, in this example, the length L1 in the longitudinal direction has a length slightly longer than the diameter r of the two wires W.

The side-by-side guide 4F shown in FIG. 23E is composed of a plurality of openings 4FW according to the number of wires W. Each wire W passes through a different opening 4FW. Each opening 4FW of the side-by-side guide 4F has a diameter (length) L1 slightly longer than the diameter r of the wire W, and the arrangement direction of the openings 4FW is used to restrict the side-by-side direction of the plurality of wires W.

Fig. 24 is a structural diagram showing a modification of the guide groove of this embodiment. The guide groove 52B has a width (length) L1 and a depth L2 that are longer than the diameter r of the wire W. Between one guide groove 52B through which one wire W passes and another guide groove 52B through which another wire W passes, a partition wall portion along the feeding direction of the wire W is formed. The first guide portion 50 uses the arrangement direction of the plurality of guide grooves 52B to restrict the parallel direction of the plurality of wires.

Figures 25A and 25B are structural diagrams showing a modification of the wire feeding portion of this embodiment. The wire feeding portion 3B shown in FIG. 25A includes a first wire feeding portion 35a and a second wire feeding portion 35b that each send out one wire W. Each of the first wire feeding portion 35a and the second wire feeding portion 35b has a first feeding gear 30L and a second feeding gear 30R.

One wire W fed by the first wire feeding portion 35a and the second wire feeding portion 35b is guided by the side-by-side guide 4A shown in Figure 4A, Figure 4B, or Figure 4C, or by the side guide 4A shown in Figure 4A, Figure 4B, or Figure 4C. The side-by-side guides 4B to 4E shown in FIG. 23A, FIG. 23B, FIG. 23C, or FIG. 23D are aligned with the guide groove 52 shown in FIG. 5 in a predetermined direction.

The wire feeding portion 3C shown in FIG. 25B includes a first wire feeding portion 35a and a second wire feeding portion 35b that each send out one wire W. Each of the first wire feeding portion 35a and the second wire feeding portion 35b has a first feeding gear 30L and a second feeding gear 30R.

The one wire W fed by the first wire feeding portion 35a and the second wire feeding portion 35b, respectively, is guided by the side-by-side guide 4F shown in Fig. 23E and the guide groove 52B shown in Fig. 24, Side by side in the established direction. In the wire feeding portion 30C, the two wires W are independently guided, so if a mechanism is formed that can independently drive the 1 wire feeding portion 35a and the second wire feeding portion 35b, it is also possible to separate 2 wires. The feeding sequence of the wire is staggered. In addition, when one of the two wires W is wound around the reinforcing bar S, the feeding of the other wire W is started to wind the reinforcing bar S, and the two wires are also fed at the same time. In addition, even if the feeding of the two wires is started at the same time, if the feeding speed of one wire W is different from the feeding speed of the other wire W, the two wires W are also fed at the same time.

Figures 26 to 31 show the structure and operation of the grips of other implementations The explanatory diagram illustrates another embodiment of the direction in which one end WS of the wire W is bent.

The first guide portion 50 of the crimped guide portion 5A forms an arc-shaped metal wire W, which is arranged at the cutting and discharge position P3 and forms the side-by-side guide 4A fixed blade portion 60 and the guide of the first guide portion 50 The lead pins 53 and 53b have a total of three points, which are constrained by the positions of two points on the outside and one point on the inside of the arc to be bent to form a slightly circular ring Ru.

In the action of feeding the wire W in the reverse direction by the wire feeding portion 3A to wind up the steel bar S, the wire W moves in the direction in which the diameter of the loop Ru decreases.

In the above embodiment, as shown in FIG. 19A, the end WS of the wire W is bent by the preliminary bending portion 72 to the wire W between the fixed holding member 70C and the second movable holding member 70R. The opposite outside. Thereby, the end part WS of the wire W is retracted from the moving path of the wire W in the action of winding the wire W on the reinforcing steel S. As shown in FIG. In the embodiment shown in Figs. 26 and 27, the end WS of the wire W is bent to the outer side opposite to the wire W passing between the fixed holding member 70C and the second movable holding member 70R. In this case, it is bent to the inner side in the radial direction of the loop Ru formed by the wire W. In the embodiment shown in FIGS. 28 and 29, the end WS of the wire W is bent to the outer side opposite to the wire W passing between the fixed holding member 70C and the second movable holding member 70R. In this case, it is bent to the outer side of the ring Ru formed by the wire W in the radial direction. Therefore, the holding portion 70 is provided with a preliminary bending portion 72a to move the wire W from the moving path Ru3 of the wire in the direction in which the diameter of the ring Ru of the wire W is reduced when the wire W is about to be wound on the steel bar S toward the wire. The end WS of W is bent in a predetermined direction when it is retracted.

In FIGS. 26 and 27, the preliminary bending portion 72a is provided on the surface of the fixed gripping member 70C facing the first movable gripping member 70L, with respect to the radial direction of the ring Ru formed by the wire W, and The direction Ru2 perpendicular to the feeding direction of the wire W of the side-by-side guide 4A protrudes in the direction in which the wire W is bent inward.

Thereby, in the action of gripping the wire W by the first movable gripping member 70L and the fixed gripping member 70C, the end WS of the wire W is bent toward the radial direction with respect to the loop Ru formed with the wire W, and The inner side of the direction Ru2 perpendicular to the feeding direction of the wire W of the side-by-side guide 4A. In addition, the end WS of the wire W with respect to the axial direction Ru1 of the ring Ru formed by the wire W, as shown in FIG. 19A, will face the metal between the fixed holding member 70C and the second movable holding member 70R The opposite outer side of the wire W is bent.

Thereby, the end portion WS of the wire W passing between the first movable holding member 70L and the fixed holding member 70C does not differ from the end WS of the wire W passing through the fixed holding member 70C and the second movable The wire W between the gripping members 70R interferes, and it is possible to prevent the end WS of the wire W from being caught in the wire W.

In Figures 28 and 29, the preliminary bending portion 72a is provided on the surface of the fixed gripping member 70C facing the first movable gripping member 70L, with respect to the radial direction of the ring Ru formed by the wire W, and The direction Ru2 perpendicular to the feeding direction of the wire W of the side-by-side guide 4A protrudes in the direction in which the wire W is bent outward.

Thereby, during the operation of the first movable gripping member 70L and the fixed gripping member 7C to grip the wire W, the end WS of the wire W is bent and faces in the radial direction with respect to the loop Ru formed with the wire W, and Outside of the direction Ru2 perpendicular to the feeding direction of the wire W of the side-by-side guide 4A. In addition, the end WS of the wire W with respect to the axial direction Ru1 of the ring Ru formed by the wire W, as shown in FIG. 19A, will face the metal between the fixed holding member 70C and the second movable holding member 70R The opposite outer side of the wire W is bent.

Thereby, the end portion WS of the wire W passing between the first movable holding member 70L and the fixed holding member 70C does not differ from the end WS of the wire W passing through the fixed holding member 70C and the second movable The wire W between the gripping members 70R interferes, and it is possible to prevent the end WS of the wire W from being caught in the wire W.

Compared to the embodiment described in Figs. 26 to 29, the end WS of the wire W can be retracted from the moving path of the wire W during the action of winding the wire W to the reinforcing bar S, it is also possible The end WS of the wire W is bent to the side of the wire W passing between the fixed holding member 70C and the second movable holding member 70R. In FIGS. 30 and 31, the first guide portion 50 provided in the crimping guide portion 5A restricts the position of the end portion WS of the wire W. The length restriction portion 74 forms the end portion WS of the wire W. , Guide to the outside of the radial direction of the loop Ru formed by the wire W and the direction Ru2 perpendicular to the feeding direction of the wire W of the side-by-side guide 4A.

Thereby, in the action of pushing the wire W so that the end WS of the wire W abuts against the length restriction portion 74, the end WS of the wire W will face the radial direction of the loop Ru formed by the wire W, and perpendicular The wire W of the side-by-side guide 4A is bent outside the direction Ru2 in the feed direction.

As a result, the end WS of the wire W passing between the first movable holding member 70L and the fixed holding member 70C is bent so that it does not pass and fix in the axial direction Ru1 of the ring Ru formed by the wire W The wire W passing between the gripping member 70C and the second movable gripping member 70R interferes with each other. Therefore, when the wire W is wound around the steel bar S, the end WS of the wire W is prevented from being caught in the metal. Wire W.

As another modification of this embodiment, it can also replace the structure in which multiple wires W are sent out at the same time. Feed the plural metal wires in the opposite direction to tighten the steel bar S.

In addition, it may be a structure provided with a magazine that accommodates short wires W, and supplies a plurality of wires W at a time.

In addition, it may be a structure in which the main body does not have a magazine and receives the wire supplied from an external independent wire supply unit.

In addition, the present invention can also be applied to a binding machine that bundles pipes and the like as a bundle with wires.

In addition, in the present embodiment, a transportable rebar binding machine 1A is described as an example, but the present invention is not limited to this, and may be, for example, a fixed installation type binding machine.

Part or all of the above-mentioned embodiments can be described in the appendix below. (Appendix 1)

A binding machine includes: a receiving part (magazine) capable of extending the metal wire; a metal wire feeding part, which sends out the metal wire extending from the receiving part; and a crimping guide part to make the metal wire feeding part The sent wire is bent and wound around the bundle; and the bundle portion holds and twists the wire wrapped around the bundle by the crimp guide portion, wherein the bundle portion has a bent portion, which Bend the wire so that after the bundle is bundled, the end of the wire will be located closer to the bundle than the top of the most protruding wire in the direction away from the bundle. (Appendix 2)

In the binding machine described in Appendix 1, the bending portion has a fulcrum portion that becomes a bending fulcrum when the wire is bent, and a bending portion that bends the wire using the fulcrum portion as a fulcrum. (Appendix 3)

In the strapping machine described in Appendix 2, the bend is installed so as to move in the direction approaching and leaving the bundle. By moving a predetermined distance in the direction approaching the bundle, the fulcrum is used as the fulcrum. The wire is bent to the side of the bundle. (Appendix 4)

In the binding machine described in any one of appendices 1 to 3, the binding portion has a gripping portion that grips the wire, and the bending portion bends the wire gripped by the gripping portion. (Appendix 5)

In the binding machine described in Appendix 4, the bending section bends the wire held by the holding section before the wire is twisted. (Appendix 6)

In the binding machine described in appendix 4 or 5, the bent portion is provided around the grip portion and can move along the axis direction of the grip portion. (Appendix 7)

In the binding machine described in Appendix 6, the bent portion is provided so as to cover at least a part of the grip portion. (Appendix 8)

In the binding machine described in any one of appendices 4 to 7, the fulcrum part is provided in the grip part.

In addition, the so-called "holding" is not only a state in which a pair of gripping members sandwich the wire, but also includes a state called an engagement state in which the wire can move between the pair of gripping members.

This application is based on Japanese Patent Application No. 2015-145283 filed on July 22, 2015, and Japanese Patent Application No. 2016-136067 filed on July 8, 2016. These contents are incorporated by reference. In the description of the present invention.

1A: Rebar Bundling Machine 2A: Magazine 20: scroll 3A: Wire feeding part (wire feeding member (feeding member)) 4A, 4B, 4C, 4D, 4E, 4F: Side by side guide (restriction member (feed member)) 5A: Curling guide (guide member (feeding member)) 6A: Cutting part 7A: Bundling part (bundling member) 8A: Strapping part drive mechanism 11A: Grip 12A: Trigger 13A: Switch 14A: Control Department 15A: battery 20b: Flange 30L: 1st feed gear 30R: 2nd feed gear 31L: Tooth 31La: Tooth bottom circle 32L: The first feed groove 32La: The first inclined plane 32Lb: 2nd inclined surface 31R: Tooth 31Ra: tooth bottom circle 32R: 2nd feed groove 32Ra: 1st inclined surface 32Rb: 2nd inclined surface 33: Drive 33a: Feed motor 33b: Transmission mechanism 34: Displacement part 35: The first displacement member 36: The second displacement member 4AW, 4BW, 4CW, 4DW, 4FW: opening 4AG: Guide body 50: The first guide 51: The second guiding part 52, 52B: guide groove (guide part) 53: guide pin 53a: Retreat agency 54: Fixed guide 54a: wall surface 55: Movable guide 55a: wall surface 55b: shaft 60: fixed blade 61: Rotating blade 61a: axis 62: Transmission mechanism 70: Control Department 70C, 700C: fixed holding member 70L, 700L: The first movable holding member 70La: recess 70Lb: convex part 70R, 700R: 2nd movable holding member 71: Bending part 71a, 71b: bend 72,702: Preliminary bending part 72b: convex 73: recess 74,701: Length restriction section 75: Falling prevention part 76: Falling prevention part 80: Motor 81: reducer 82: Rotation axis 83: movable member 84: Rotation limiting member 200: Concrete 201: Surface Ru: circle Ru1: axis direction W, W1, W2, Wb: wire Wp: top WS: End WE: the other end WS1, WE1: The first bending part WS1, WE2: 2nd bending part

Fig. 1 is a structural diagram viewed from the side showing an example of the overall structure of the reinforcing bar binding machine of the present embodiment. Fig. 2 is a structural diagram viewed from the front showing an example of the overall structure of the reinforcing bar binding machine of the present embodiment. Fig. 3 is a structural diagram showing an example of the feed gear of this embodiment. Fig. 4A is a structural diagram showing an example of the side-by-side guidance of this embodiment. Fig. 4B is a structural diagram showing an example of the side-by-side guidance of this embodiment. Figure 4C is a structural diagram showing an example of the side-by-side guidance of this embodiment. Fig. 4D shows a structural diagram of an example of metal wires arranged side by side. Fig. 4E is a structural diagram showing an example of intersecting and twisted metal wires. Fig. 5 is a structural diagram showing an example of the guide groove of this embodiment. Fig. 6A is a structural diagram showing the main part of the grip of this embodiment. Fig. 6B is a structural diagram showing the main part of the grip of this embodiment. Figure 7 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Fig. 8 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Figure 9 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Fig. 10 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Figure 11 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Figure 12 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Figure 13 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Figure 14 is an explanatory diagram of the operation of the reinforcing bar binding machine of this embodiment. Figure 15A is an explanatory diagram of the action of winding a wire around a steel bar. Figure 15B is an explanatory diagram of the action of winding the wire around the steel bar. Figure 15C is an explanatory diagram of the action of winding the wire around the steel bar. Figure 16A is an explanatory diagram of the action of bending the wire. Figure 16B is an explanatory diagram of the action of bending the wire. Figure 16C is an explanatory diagram of the action of bending the wire. Fig. 17A is an example of the effect of the reinforcing bar binding machine of the present embodiment. Figure 17B is an example of the functions and problems of the conventional steel bar tying machine. Figure 18A is an example of the effect of the reinforcing bar binding machine in this embodiment. Figure 18B is an example of the functions and problems of the conventional steel bar tying machine. Figure 19A is an example of the effect of the reinforcing bar binding machine in this embodiment. Figure 19B is an example of the functions and problems of the conventional steel bar tying machine. Fig. 20A is an example of the effect of the reinforcing bar binding machine of the present embodiment. Figure 20B is an example of the effect of the reinforcing bar binding machine in this embodiment. Figure 20C is an example of the functions and problems of the conventional steel bar tying machine. Figure 20D is an example of the functions and problems of the conventional steel bar tying machine. Fig. 21A is an example of the effect of the reinforcing bar binding machine of the present embodiment. Figure 21B is an example of the functions and problems of the conventional rebar tying machine. Fig. 22A is an explanatory diagram showing a modification of this embodiment. Fig. 22B is an explanatory diagram showing a modification of this embodiment. Fig. 22C is an explanatory diagram showing a modification of this embodiment. FIG. 23A is a structural diagram showing a modification of the side-by-side guidance of this embodiment. FIG. 23B is a structural diagram showing a modification of the side-by-side guidance of this embodiment. Figure 23C is a structural diagram showing a modification of the side-by-side guidance of this embodiment. FIG. 23D is a structural diagram showing a modification of the side-by-side guidance of this embodiment. Fig. 23E is a structural diagram showing a modification of the side-by-side guidance of this embodiment. Fig. 24 is a structural diagram showing a modification of the guide groove of this embodiment. Fig. 25A is a structural diagram showing a modification of the wire feeding portion of this embodiment. Fig. 25B is a structural diagram showing a modification of the wire feeding portion of this embodiment. Fig. 26 is an explanatory diagram showing the structure and operation of the grip portion of another embodiment. Fig. 27 is an explanatory diagram showing the structure and operation of the grip portion of another embodiment. Fig. 28 is an explanatory diagram showing the structure and operation of the grip portion of another embodiment. Fig. 29 is an explanatory diagram showing the structure and operation of the grip portion of another embodiment. Fig. 30 is an explanatory diagram showing the structure and operation of the grip portion of another embodiment. Fig. 31 is an explanatory diagram showing the structure and operation of the grip portion of another embodiment.

1A: Rebar Bundling Machine

2A: Magazine

20: scroll

3A: Wire feeding part (wire feeding member (feeding member))

4A: Side-by-side guidance (limiting member (feeding member))

5A: Curl guide (guide member (feeding member))

6A: Cutting part

7A: Bundling part (bundling member)

8A: Strapping part drive mechanism

11A: Grip

12A: Trigger

13A: Switch

14A: Control Department

15A: battery

30R: 2nd feed gear

36: The second displacement member

4AW: opening

4AG: Guide body

50: The first guide

51: The second guiding part

52: Guiding ditch (guidance part)

53: guide pin

53a: Retreat agency

54: Fixed guide

54a: wall surface

55: Movable guide

55a: wall surface

55b: shaft

61: Rotating blade

61a: axis

62: Transmission mechanism

70: Control Department

70C: Fixed holding member

71: Bending part

74: Length restriction part

80: Motor

81: reducer

82: Rotation axis

83: movable member

84: Rotation limiting member

W: wire

Claims (6)

A strapping machine includes: a feeding member capable of winding a wire around a bundle; a holding member, holding the wire wound by the feeding member on the bundle; a bending member, bending the wire so that the holding The end of the wire held by the member is closer to the bundle side than the top of the wire; and the binding member binds the bundle by twisting the wire held by the holding member; wherein the bending The member bends the wire held by the holding member before the wire is twisted by the binding member. For the strapping machine described in item 1 of the scope of the patent application, the bending member is arranged to be movable in the direction of approaching and leaving the bundle, and by moving a predetermined distance toward the direction of approaching the bundle, the The wire gripped by the gripping member is pushed toward the bundle side and bent toward the bundle side. The binding machine described in the first item of the scope of patent application, wherein the feeding member is configured to reversely rotate the feeding motor that switches the feeding direction of the wire after the wire is held by the holding member And pull back the wire. For the strapping machine described in item 1 of the scope of patent application, the bending member is linked to the twisting action of the strapping member to twist the wire to bend the wire. The binding machine described in the first item of the scope of patent application, wherein the bending member is arranged around the holding member and can move along the axis of the holding member As for the strapping machine described in item 5 of the scope of patent application, the bending member is arranged to cover at least a part of the holding member.

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